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Natural Resources 2024年第1期15卷 28-50页

作者： Gambo Ranaou Noura kamayé tourba Karimou Dia Hantchi Bouba Hassane Moussa Konaté Department of Geology Faculty of Science and Techniques Abdou Moumouni University Niamey Niger Department of Geology Faculty of Science and Techniques Dan Dicko Dankoulodo University Maradi Niger

The Boulon Djounga eastern perimeter is part of the Tiawa operating permit of the Société des Mines du Liptako (SML), located in the central southwestern part of Liptako (Niger). In this study, we used field data, Reverse Circulation (RC) surveys and chemical analyzes of gold to determine the characteristics of gold and its mineralization style. The eastern perimeter of Boulon Djounga is represented by a succession of metabasalts and metasediments both intersected by intrusions of quartz and dolerite dykes, and covered by sandstone and clayey rocks. Gold is present in low contents (0.00 - 0.30 ppm) in the sedimentary cover and in medium (0.30 - 1.00 ppm) or high contents (1.00 - 4.534 ppm) in the metasediments, and in the gray quartz veins and locally in the volcanics. It exists in a disseminated state or in a concentrated state in the surrounding areas in the form of discrete grains associated with sulphurous minerals (pyrite: FeS2, chalcopyrite: CuFeS2 or arsenopyrite: FeAsS). The presence of gold in the quartz veins, and the NE-SW and NW-SE orientations of the ore bodies suggest that the eastern Boulon Djounga gold mineralization would be established during a late magmatic extensive phase.

关键词： Liptako Gold Mineralization Metasediments-Volcanics Quartz Veins Sulphurous Minerals Niger

Tectonic Style Associated with the Doleritic Dykes of the Téra-Ayorou Pluton (Liptako, Western Niger)

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International Journal of Geosciences 2024年第8期15卷 567-581页

作者： kamayé tourba Gambo Ranaou Noura Abdou Dodo Bohari Karimou Dia Hantchi Mallam Mamane Hallarou Hassane Ibrahim Maharou Yacouba Ahmed Moussa Konaté Groundwater and Georesources Laboratory Department of Geology Abdou Moumouni University Niamey Niger UMR of Water Sciences Mineral Resources Uses and Management Dan Dicko Dankoulodo University Maradi Niger

The doleritic dykes present in the Téra-Ayorou pluton crosscut the basement of the Nigerien Liptako and are part of the system of intrusive mafic dykes in the Paleoproterozoic domain of the Léo-Man ridge. In the previous work, emphasis was placed on the petrology, geochemistry and geochronology of the Liptako doleritic dykes. This study aims to analyze the tectonic style of intrusive doleritic dykes in the Téra-Ayorou pluton. The characterization of the deformation which affected the doleritic dykes of the Téra-Ayorou pluton is important for the evaluation of their economic potential. To this end, measurements of tectonic structure planes were taken in the field, and samples were taken from the chilled margin and cores of dolerite dykes, before being processed in the laboratory. Analysis of the tectonic structures collected revealed a brittle tectonic pattern, characterizing a phase of deformation subdivided into two episodes D1 and D2. Episode D1, with its subvertically dipping normal faults and simple N70˚ - N110˚ fractures, is compatible with N-S extension. On the other hand, episode D2, which created shear corridors by reactivation of pre-existing fractures and oriented N150˚ - N170˚, is associated with a WSW-ENE extension. These results open up prospects for the exploration of gold, uranium mineralization and diamonds in the north-west of Niger.

关键词： Dolerite Dykes Associated Structures Deformation Phases North Liptako Niger

Characteristics of Gold and Its Mineralization Style in the Boulon Djounga Eastern Perimeter of Liptako Mining Company (Central Southwestern Niger)

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Origin of Phosphorite Nodules of Lebedinsky Iron Deposit in Kursk Magnetic Anomaly (KMA) of the Russian Platform

Natural Resources（自然资源） 2024年第1期

作者： Gambo Ranaou Noura kamayé tourba Karimou Dia Hantchi Bouba Hassane Moussa Konaté

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Journal of China University of Geosciences 2005年第2期16卷 170-177,182页

作者： tourba kamaye Phillip Romanovitch Faculty of Earth Resources China University of GeosciencesWuhan 430074China Department of Mineral ResourcesMoscow State Geological Prospecting AcademyMoscow 17873Russia

Phosphorite has become increasingly important as the raw material for phosphatic fertilizer. Phosphorite nodules are widespread in the Kursk complex deposit (Russian platform). Genesis of these nodules has long been a matter of debate, and this has hampered understanding of the mechanism and controls in the formation of the nodules. In this paper, we report the petrographical, mineralogical, and geochemical data of the Lebedinsky phosphorite nodules. Petrographic study reveals complex phosphatic cement resulting in the replacement of apatite minerals around quartz grains. The main mineral composition consists of quartz, phosphate minerals (apatite, francolite mainly), feldspar, iron hydroxides and carbonate minerals. These results, when combined with available data, are used to address the origin of the phosphorite nodules. The nodules are characterized by the universal presence of biogenic and chemical signatures which is phosphorus crown around crystal grains. The structure of the nodules is massive. Their texture is depicted by basaltic cement and concretion, which consists mainly of apatite and its varieties, with general formula: Ca_10 (PO_4, CO_3) 6(F,OH,Cl). Variation of mineralogy appears dependent on geological setting. Microscopic observations of biogenic fossils in Lebedinsky phosphorite favor a chemical and biogenic origin of phosphorites. Weathering has been suggested to be capable of liberating as much as 20 %-35 % P_2O_5 from sedimentary rocks. Previous investigations demonstrate that weathering of the Proterozoic substratum was the main cause in the formation of Fe, Mo, Mn, Pb, Zn, and P in the Russian platform. We therefore suggest that both weathering and biochemical processes have been positive in the formation of the Lebedinsky phosporite nodules. However, whether continental weathering or oceanic bio-chemical processes are more relevant in the phosphorite accumulation remains undetermined.

关键词： nodular phosphorite Kursk magnetic anomaly Russian platform weathering bio-chemical process

南堡凹陷温度场、压力场及流体势模拟研究——基于Basin2盆地模拟软件

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地质科技情报 2003年第1期22卷 67-74页

作者：肖军王华郭齐军韩晋阳甘华军 kamaye tourba 中国地质大学资源学院湖北武汉430074 中国石油化工股份有限公司油田部北京100029

运用 Basin2盆地模拟软件 ,对南堡凹陷进行的温度场、压力场的模拟结果表明 ,南堡凹陷主体属常温、常压范围 ,仅局部地区存在轻微程度的温、压异常 ,综合其它资料说明其具有富油、贫气的特征 ;流体势模拟结果显示 ,南堡凹陷的烃源岩主... 详细信息

运用 Basin2盆地模拟软件 ,对南堡凹陷进行的温度场、压力场的模拟结果表明 ,南堡凹陷主体属常温、常压范围 ,仅局部地区存在轻微程度的温、压异常 ,综合其它资料说明其具有富油、贫气的特征 ;流体势模拟结果显示 ,南堡凹陷的烃源岩主要来自沙河街组和东营组 ,含烃流体的运移和聚集主要发生在东营组一段以及明化镇组和第四系地层沉积期间 ,且流体势的低值区应是有利的成藏区 ,是今后勘探的重要区域。

关键词：南堡凹陷温度场压力场流体势盆地油气勘探烃源岩

渤海湾盆地南堡凹陷火山岩特征及其有利成藏条件分析

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地质科技情报 2004年第1期23卷 52-56页

作者：肖军 kamaye tourba 王华王方正马乾中国地质大学研究生院中国地质大学资源学院中国地质大学地球科学学院中国石油冀东油田勘探开发研究院

研究表明,渤海湾盆地南堡凹陷火山岩发育区的岩浆活动热事件促进了烃源岩的早熟,有利于生烃和成藏。其火山岩与烃源岩的三种组合方式,具有良好的油源条件,且多分布在有利的圈闭上,具有油气富集的最基本条件。火山岩储集空间主要为裂缝... 详细信息

研究表明,渤海湾盆地南堡凹陷火山岩发育区的岩浆活动热事件促进了烃源岩的早熟,有利于生烃和成藏。其火山岩与烃源岩的三种组合方式,具有良好的油源条件,且多分布在有利的圈闭上,具有油气富集的最基本条件。火山岩储集空间主要为裂缝、微裂缝和粒间溶蚀孔隙等,其发育主要受岩性、粒度、构造应力和充填期四大因素控制,其裂隙主要发育期和油气聚集期相近从而有利于聚油成藏。火山岩型油气藏的勘探将成为南堡凹陷油气储量和产量新的增长点。

关键词：火山岩成藏条件油气藏南堡凹陷渤海湾盆地

渤海湾盆地南堡凹陷沉降过程、岩浆活动、温压场演化与油气成藏的耦合分析

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石油实验地质 2003年第3期25卷 257-263,268页

作者：韩晋阳肖军郭齐军 tourba kamayE 赵忠新甘华军中国地质大学资源学院湖北武汉430074 中国石油化工股份有限公司油田部北京100029

南堡凹陷区域构造上位于渤海湾盆地黄骅坳陷北部 ,是一个新生代开始发育的含油气凹陷 ,经历了断陷期和坳陷期两个演化阶段。回剥分析表明 ,盆地充填具有“幕式”沉降特征。文中通过对岩浆活动、温压场演化及其与沉降速率之间关系的研究 ... 详细信息

南堡凹陷区域构造上位于渤海湾盆地黄骅坳陷北部 ,是一个新生代开始发育的含油气凹陷 ,经历了断陷期和坳陷期两个演化阶段。回剥分析表明 ,盆地充填具有“幕式”沉降特征。文中通过对岩浆活动、温压场演化及其与沉降速率之间关系的研究 ,厘定了岩浆活动在盆地演化中的时间序次及其与沉积作用的耦合关系 ,识别出岩浆活动与盆地古温压场演化之间的成生关系 ,并为油气成藏条件的再认识提供了重要而新颖的研究思路与途径。预计 2 0 10— 2 0 15年新疆和近海将建成特大型油气区 ,加上松辽、渤海湾、鄂尔多斯、川—渝、柴达木等 ,全国石油年产量可能逐步达到 18× 10 4～ 2 0× 10 4t ;天然气年产量可能达到 10 0 0× 10 8m3 以上。

关键词：沉降速率岩浆活动温压场演化油气成藏南堡凹陷渤海湾盆地